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(Model.) 2 sheetssheet 1. C. E. CHURCH. INJEGTOR.

' UNrrnD STATES CHARLES E. CHURCH, OF BOSTON, MASSACHUSETTS, ASSIGNOR TOTHE .HANCOCK INSPIRATOR COMPANY, OE SAME PLACE.

lNJEoToR.

SPECIFICATION forming part of Letters Patent No. 475,201, dated May'l'?,1892. Application filed April 22, 1890. Serial-No. 348,982. (Model.) v

To @ZZ whom/.it may concern: f

Be it known that I, .CHARLES E. CHURCH, of Boston, in the county ofSuffolk, and in the State of Massachusetts, have invented certain newand useful Improvements in Injectors; and I do hereby declare that thefollowing is a full, clear, and'exact description thereof, referencebeing had to the accompanying drawings, in which- Figure l represents avertical longitudinal section through the center of my improvedapparatus; Fig. 2, a similar section of a modi- Iied construction, andFig. 3 a horizontal section through dotted lines x @cof Fig. 2.

Letters of like name and kind refer to like parts in each of the'figures My invention relates, primarily, to the class of injectorsknown as single-jet forcing-injectors, and also to those injectors inwhich a lifting-jet apparatus and a forcing-jet apparatus are combinedand known as doublejet injeotorsf but it relates more particularly tothe well-known Hancock inspirator-an injector of the latter kind.

It has for its object to increase the amount of uid delivered and toenable such injector to operate more efficiently over a wider range ofsteampressure, especially on long lifts, and also when the supply-wateror other (luid is of a higherv temperature.- than has been heretoforepracticable.

To this end my improvement consists, when applied to a single-jetforcing-injector, in the construction and arrangement of a supplementalinlet to the combining and delivery tube of the apparatus formed by oneor more ports communicating with the interior of said tube through oneor more openings therein (preferably at or near its throat) and with thewater-supply chamber, with a valve adapted to permit a flow ot' fluidfrom the said chamber through the said inlet to the interior of the tubewhen the pressure within said tube at the point therein where the inletcommunicates therewith is about equal to or is less than the pressure inthe water-chamber, and which valve will close automatically when thepressure within the tube at the `said point therein is about equal to oris greater than the pressure in the water-supply chamber,

gthereby preventing reflux of the fluid from the tube through the inletinto the said charnber.

adapted'and 'arranged to deliver water or* other fluid continuouslyA to`the said forcer; second, in combining with the said forcer a lifter,the combining and delivery tube of which lifter is provided at its mouthwith the usual inlet from the suction-chamber and is v provided, also,with a supplemental inletl formed by one or more ports ,communicat- `ingwith the interior of the tube through :one or more openings and with thesuctionchamber, with a valve adapted to close the `said supplementalvinlet when the pressure within this tube is about equal to orA greaterthan the pressure in the suction -chamben such lifter being suitablyadapted-and arranged to deliver water or other uid continuously to thesaid forcer; third, in combining with an ordinary forcer theabove-described lifter having a supplemental inlet land valve to controlthe same, said lifter being adapted and arranged to deliver water ATENTOritron;Y 4

or other fluid continuously tothe water-sup.

ply chamber of said forcer, and, fourth, in combining with the forcer,having a supplemental inlet, as described, and either with or without avalve to vcontrol the same a lifter `also having a supplemental inlet,as described, fand either with or without a val-ve to control thisinlet, such lifter being adapted and arranged to deliver water or otherduid continul ousl y lto such. forcer.

In thedrawings, the casing of theappara- The pi per?` forrthg tus isdesignated by A B. Y ad mission ofthe actuating-steam is to 4beconnected with the chamber S, the pipe'conmuni-t' eating with. the wellor reservoir is to be *connected to the suction-chamber C, and the pipei' for delivery or discharge of water to the boiler ris to'be connectedat I).

In Fig. 1, E is the steam-jet tube of the lifting apparatus seated inthepartition P. F F is its combining and delivery tube made in twoportions, the upper portion F,inclosed in IOO the suction-chamber C,being seated in the partitionT, andthe lower portion, inclosed in theintermediate .or forcer supply chamber J, being seated in the partition'1"'. Between these two partitions is formed a chamber G', connectedWith the water-chamber through theconduitf and' 'aperture g, formingasup`' plementary inlettothe interior ol" this tube,

whichq'nlet is controlled by the valve G, seated in the aperture g andguided by means of itsstem, which fits loosely in the bonnet hf screwedinto the casing A. The water-chamber C extends around that portion oftheinterior casing which incloses the 'conduit f vand chamber G', so thatwater f rom'the'wellmay rise around the upper portion of the tube F tenterv the-mouth'thereof, and,asfis clearly substantially lasdoes'thevalve G of thelit't-A shown; may '-also enter the interior ofthe ytube F F through the conduitfand chamber G' W'h'enthe'valveG isopen. This lifting apparatus,"-though slightl-ylmoditied 'in `itsconstruction,r` is substan tiallythe-same inprinci'- ple as thatdescribed (and shownby Figy ofI the drawingsfthereo'f) infLetters Patentof the UnitedStates No. 405,992, dated J une 25, 1889,

whichwere granted to me -for improvements in ejector's, in which patentsome of its advantagesare more clearlygrset forth.

K'is `the-steam-jet tube ofthe forcing vapparat-us, and LL' is itscombining and delivery tube, made in'two portions and seated inpartitions which form a chamber M and conduitv mwhich' connect with theintermediate or` for'cer'supply-chamber J through aperture m', forming asupplementaryinlet to theinterior Ioiithis combininganddelivery; tube,which inlet is controlled byv` the valve My operating ingfap'paratus.'vThe vintermediattla or forcer supplychamber J surrounds that portion* oftheinteriorcasing-which incloses the chamber -M and the tube-Land whentheinjector is inroperation conducts thewater delivered by the lifterupto the-mouth of the combining-.tube L of the forcer and also throughap.-

'erture "m, conduit n, and chamberM' to the interiorlof the tube L L'when'the'valve M is open.Y The chamber Jcommunicates, also,

with the delivery-pipe D through an aperture controlled by the valve Q,and an ordinary V being closed andthe intermediate'overowvalve Q andthefinal overflow-valverbeing open,-s'team is 'admined-'through' thepipe Sand will iiow through the liftersteam-jet tube `E,ithe liftercombiningand delivery tube 'F F', the intermediate chamber J, and thencethrough theforcer combiningv and delivery tube-'L' L', and also throughthe outlet con'- trolled by the valve Q into the delivery-pipe the wellor reservoir in the pipe andl chamy vber() and willV pass up around theexterior of'thetube F F' and enter the latter at its mouth, where, beingacted upon by thesteam issuing from the jet-tube E, its velocity will beaccelerated, and the Water drawn from the .well or reservoir will followthe course heretofore taken by theI steam. The valve Q should then beclosed. All the water delivered from thelifter will then pass throughthe forcer combining and delivery tube L L' to the final overiiow. Thevalve yV should then beopen to admit steam tothe forcer steam-jet tubeK, which in 4issuing from'that tube will'impartsuch velocityto thestream of water in the tube L' L'f that after closing the finaloverflow-valve the lWater will entery the boiler from which theactuating-steam is taken.

Both in starting the instrument and after it isin'full operation,whenever the pressure inthe combining and 'deliverytube-F F' at` G, andthrough the conduit f, and will enter' thecombining and delivery tube FF' at the Y'supplemental inlet G', andw-heneverfthel pressure .withinthe tube'F F' at the point vwherethe supplemental inlet G'. communi.

cates therewith is about equal to or is greater- 'than the pressureinthe water-chamber C the valve G will beautomatically closed and TOO`rios will prevent fa reiuxof the water from -the "ever the pressure inthe tube L L' at the supplemental inlet is about equal to or is in ex-I'IO cess of that in the chamber J-the valve M will `be automaticallyclosed and will prevent a refiux of the water from the tube L L' intothe'supply-chamber J. While this valve remains @closed the supplementalinlet M" performs no function and the tube L L operates substantial-lyas itit were a continuous tube.

Fig. 2 of the drawings represents an alternate construction, showing howthe supplemental inlet and a valve for controlling it automatically canbe formed whollyin the combining and delivery tube and be arranged in`.the casing of an inspirator as 4nowmanutactured without making anymaterial change` in said casing for their reception. In this figure E isVthe steam-jet tube or nozzle of the lifter, and F F the liftercombiningand delivery tube, which tube is made of two pieces F and F',joined by screw-threads, as shown,

and screwed into and held in position in the partition-T. Vithin thiscombining and delivery tube an annular chamber G is formed, whichcommunicates with the water or suction chamber C through the ports orpassages f f g g `and with the interior of the tube through the openingbetween the adjacent ends of the two portions F and F. An automaticannular valve G, seated on the inner upper end of the lower portion F ofthe tube and encircling and loosely fitting the cylindrical lower end ofthe upper portion F within the casing' G', controls the supplementalinlet formed'by the ports f fg g in.

the'lower portion F of .the tube. This construction of a lifter issubstantially the saine as is shown in said Patent No. 405,992, Figs. land 2. The forcer of Fig. 2 is similarly constructed. K is the steam-jettube or nozzle, and L L the combining and delivery tube. Itssupplemental inlet is formed by the ports fm m p p and space M betweenthe two portions LL of the tube. It communicates with the forcersupply-chamber J and is controlled by the valve M in the chamber O inthe tube The arrangement ofthe passages or ports m m and lo p are moreclearly shown in Fig. 3,which is a horizontal section through the tubeLon dotted line xx, and the arrangement of the similar ports in theliftertube F is substantially identical therewith.

The operation of the apparatus shown in Fig. 2, being the same as thatshown in Fig. l, needs no further description.

An injector constructed as shown in said figures possesses all theadvantages of the inspirator, and in addition it will operate with moreefficiency over a greater range of steampressures, especially on longlifts and with hot supply-water, and over the range of steampressure atwhich an inspirator withordinary continuous tubes of similar bore andproportions is usually operated my improvement will increase thequantity of water delivered, more especially on long lifts withcomparatively high pressures ofsteam.

With an injector constructed as shown in Figs. l and 2, operating undercertain favorable conditions ot' lift, steam-pressure, temperature ofsupply-water, and quantity delivered, no injurious excess of pressurewilllbe created in the combining and delivery tube ofthe lifter or ofthe forcer atthe inlet, even though one or `both ofthe Valves G and M beremoved from the'casing, and yet an advantage will be obtained by reasonof the supplemental inlets G and M; but, as when theinjeetor is operatedunder more unfavorable conditions, suchexcess of pressure will becreated which will require one,and sometimes both, of the valves toclose the respective inlet or inlets, I` prefer to use the said valves,

combining and delivery tube as communicating with the interior of thetube at or near the throat, where the velocity of the iiuid is at itsmaximum, and hence where the press- An advantage will be obtained byboth combinations.

ure in the tube is thought to be atits minimum; but I do not limitmyself to this exact location, as they will evidently perform theirfunction with some degree of efficiency if they v communicate with theinterior at some other point along the axis of these tubes betweenY themouth and delivery end. More than one supplemental inlet to eachcombining and delivery tube, communicating with its interior atdifferent points along the axis of the tube and with the water-supplychamber, with a separate'valve to control'each inlet independently, maybe used, and as the valves would not then necessarily open or closesimultaneously doubtless better results would be obtained and a moreuniform pressure be maintained Within the'tube than with the singleinlet and valve I have shown and described;l

vbut the latter construction, being more simple and less'expensive tomanufacture, is therefore deemed preferable.

Although I have shown and described'my improvement applied to a lifterand to a forcer having central steam-jet nozzles, yet it is alikeapplicable to those having annular ones, and therefore I do not proposeto limit thes'cope of my invention by confining its use to injectorsthat have central steam-jets only. It is also applicable to those doubleinjectors in which the lifter discharges directly into the mouth of -thecombining-tube of the forcer, instead of into an intermediate chamber,(as

J in the drawings.) The supplemental inletto the forcer combining anddelivery tube in this injector could then communicate with thesuction-chamber or with the delivery-tube "of the lifter through asuitable conduit leading therefrom.

In the combined lifter-and forcer arranged and constructed ashereinbeforedescribed and shown in the drawings-there is a co-operatiouand interdependence of action of the parts, the Vresult` ofwhich is anlimproved and more certain operation of the apparatus to suppl yi 'waterto a boiler than can be obtained in the other forms of combined Vapparatus heretofore made and used.

As indicated hereinbefore, `one partfof my injector will adapt itsaction to that of the IOO IIO

other part, with theresult of makingthe op bersof the lifter andforcerto the'spaces be-v tween therespective combining and delivery tubes.Inrsuch case, as already set forth hereinbefore, injurious excess ofpressure in the combining and delivery tube of the lift-er or at theinlet ofthe forcer will be prevented when' the injector is workingunderfavorable conditions.

To further improve the operation of the ap:- paratus and make it morecertain, evenunder unfavorable conditions ofv steam-pressure, height oflift, and temperature of water, I make .use lof the automatic valveswhich have been-shown and described. The-useof one of-'these Valves on`either Y the lifter or forcer is advantageous, though I prefer to supplyboth? of 'suchrparts offtheapparatus withthe valves. Where'the lifteronly is valved and' the forcer has a port oropening fromthe chamber intowhichv the. lifter discharges'to the space between its combining anddelivery` tube', the automatic valve in the lifter can act to regulatetheiwater delivered according to the needs or capacity oftheforcer.Should theflit'ter tend to delilver vmore water than the forcercouldfactupon, sothat thel pressure is-raised in the lwater-chamberbetween the lifter and'forcer, the valve would, because of back-pressureon the delivery-tube of the lifter, be c1osed,sol as to'diminish thedelivery of Waterinto said chamber. On the other hand, if theforcerlshould be delivering more water than the lifter with its Yvalveclosed could supply, said valve would, because of the lowering ofthe'pressure in the communicating chamber `or passage between the lifterand forcer, and consequently in the deliverytube ofthe lifter and thespace between the combining and delivery tubes of the latter,automatically open to admit more water to the delivery-tube;

It -the forcer only be provided with the de-v I scribed supplementalautomatic valve to close the opening into-the space between itscombining andwdelivery tubes whlch communicates with the space orchamber to which al lifter delivers water, it is possible to insuresuch' action ofthe lforcer as will keep down the pressurein the chamberor space to which the lifter-delivers its water, so that such lifter.

delivery tubes of theforcer, the valvel M.

would be opened to allow water to pass from said `chamber into thedelivery-tube,fand lthe pressure against which the lifter would have toact would be diminished, said valve will also, by automatically closing,when' the pressure in the chamber or space to which the lifter deliverstends to get below' th'at between the'combining and delivery tubes ofthe forcer, act to prevent said pressure from gettingtoo low.

The use of the specified valve on the forcer ofi/a combined lifter landforcer, whatever thek formzof lifter,- for supplying'water tothewater-chamber .of the forcer, isthen'productive of a new and usefulresult in causingthe action of the forcer to be automatically adj ust-Ved to that of the lifter andconsequently preventing undue back-pressureon the latter.

While the use of one of my supplemental valves on either the lifter orthe forcer is advantageous as improving and making more certain theaction ofthe apparatus under varying circumstances, I prefer thcconstruction and combined in any of the ways set forth in my claims,will deliver a greater quantity of` water `than when the lifter andforcer Iare arranged and combinedV as heretofore in the inspirator uponwhich the apparatus shown and described herein is an improvement.

Having thus described my invention, what I claim is 1. In an injector, aforcerthe combiningk and delivery tube of. which is-provided at itsmouth with the usual inlet from the watersupply chamber and is provided,also, with a supplemental inlet formedV by one orJnore portscommunicating with the interior of said tube through one or moreopenings therein and with said supply-chamber, with a valve IOO IIO

adapted to close said supplemental inlet automatically when the pressurewithin said tube at said' openings therein is about equal to or isgreater thanlthe pressure inv said supply-chamber, substantially asandfor the purt pose described.

2. In an injector, a forcer the combining and delivery tube of which isprovided at its mouth with the'usu'al inlet from its `watersupplychamber and is provided, also, with a supplemental inlet formed by oneor more portscommunicating with the interior of said v tube at saidopenings therein is about equal to or isl greater than the pressure insaid supply-chamber, and a lifter which is suitably adapted and arrangedto deliver Wateror other iiuid continuously to the supply-chamber ofsaid forcer, substantially as and for the purpose described.

.3. In an injector, a forcer the combining and delivery tube of which isprovided at its mouth with the usual inlet from its Watersupply chamberand is provided, also, With a supplemental inlet formed by one or moreports communicating with the interior of said tube through one or moreopenings therein and with said supply-chamber, and a lifter thecombining and delivery tube of which is provided at its mouth with theusual inlet from the suction-chamber and is provided, also, with asupplemental inlet formed by one or more ports communicating with theinterior of thetube through one ormore openings there in and with thesuction-chamber, such lifter being suitably adapted and arranged todeliver Water or other fluid continuously to the supply-chamber of thesaid forcer, substantially as and for the purpose described.

4. In an injector, a forcer the combining and delivery tube of which isprovided at its mouth with the usual inlet from its Watersupply chamberand is provided, also, with a supplemental inlet formed by one or moreports communicatingwith the interior of said tube through one or moreopenings therein and With said supply-chamber, with a valve adapted toclose the said supplemental inlet automatically when the pressure withinsaid tube at said openings therein is about equal to or is greater thanthe pressure insaid supply-chamber, and a lifter the combining anddelivery tube of which is provided at its mouth with the usual inletfrom the suctionchamber and is provided, also, with a supplemental inletformed by one or more ports communicating with the interior of the tubethrough one or more openings therein and with the suction-chamber, suchlifter being suitably adapted and arranged to deliver Water or otherfluid continuously to the supplychamber of the said forcer,substantially as and for the purpose described.

5. In an injector, a forcer the combining and delivery tube of which isprovided at its mouth with the usual inlet from its Watersupply chamberand is provided, also, with a supplemental inlet formed by one or moreports communicating With the interior of said tube through one or moreopenings therein and with said supply-chamber, and a lifter thecombining and delivery tube of which is provided at its mouth With theusual inlet from the suction-chamber and is provided, also, with asupplemental inlet formed by one or more ports communicating with theinterior of the tube through one or more openings therein and with thesuction-chamber,with a valve adapted to close the said supplementalinlet automatically when the pressure Within this tube at the saidopenin gs therein is abc ut equal to or greater-than the pressure in thesuction-chamber, such lifter being suitably adapted and arranged todeliver Water or other fluid continuously to the supply-chamber of thesaid forcer, substantiall y as and for the purpose described.

6. Injan injector, a forcer the combining and delivery tube of which isprovided at its mouth with the usual inlet from its Watersupply chamberand is provided, also, With a supplemental inlet formed by one or moreports communicating With the interior of said tube through one or moreopenings thereinand with said supply-chamber, With a valve to close saidsupplemental inlet automatically when the pressure Within vsaid tube atsaid openings therein is about equal to o r is greater .than thepressure in said supply-chamber, and a litter the combining and deliverytube of which is provided `at its mouth with the usual inlet from thesuction-chamber, and is provided, also, with a supplemental inlet formedby one or more ports communicating with the interior of the tube throughone or more openings therein and with the suction-chamber, with a valveadapted to close the said supplemental inlet automatically when thepressure within this v tube at said openings therein is about equal toor greater than the pressure in the suction-chamber, such lifter beingsuitably adaptedand arranged lto deliver Water or other fluidcontinuously to the supply-chamber of the said forcer, substantially asand forthe purpose described.

"7. In an injector, a forcer and a lifter, the combining and-deliverytube of the latter being provided at its mouth With the usual inlet fromthe suction-chamber and provided,

also, with a supplemental inlet formed by one or more portscommunicating With the interior oflsaid tube through one or moreopenings therein and With the suction-chamber,

IOO

with a valve adapted to close said supple.

IIO

